/**
 * Copyright 2010 Eric Taix
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and 
 * limitations under the License.
 * 
 */
package org.jared.synodroid.common.preference;

import org.jared.synodroid.ds.R;

import android.content.Context;
import android.preference.ListPreference;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TextView;

/**
 * A preference which shows the current value
 * 
 * @author Eric Taix (eric.taix at gmail.com)
 */
public class ListPreferenceWithValue extends ListPreference {

	private TextView value;
	// The current value
	private String currentValue;
	// External OnPreferenceChangeListener
	private OnPreferenceChangeListener listener = null;

	/**
	 * Constructor
	 * 
	 * @param context
	 * @param attrs
	 */
	public ListPreferenceWithValue(Context context, AttributeSet attrs) {
		super(context, attrs);
		setLayoutResource(R.layout.preference_with_value);
		initInternalChangeListener();
	}

	/**
	 * Constructor
	 * 
	 * @param context
	 */
	public ListPreferenceWithValue(Context context) {
		super(context);
		setLayoutResource(R.layout.preference_with_value);
		initInternalChangeListener();
	}

	/**
	 * Binds the view to the data for this preference
	 */
	@Override
	protected void onBindView(View view) {
		super.onBindView(view);
		value = (TextView) view.findViewById(R.id.preference_value);
		if (value != null) {
			int index = findIndexOfValue(getValue());
			if (index != -1) {
				value.setText(getEntries()[index]);
			}
			currentValue = getValue();
		}
	}

	/**
	 * Init the internal listener to be able to update the new value
	 */
	private void initInternalChangeListener() {
		// Call the super method as we overrided it
		super.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
			public boolean onPreferenceChange(Preference preference, Object newValue) {
				int index = findIndexOfValue(newValue.toString());
				if (index != -1) {
					value.setText(getEntries()[index]);
					currentValue = value.getText().toString();
				}
				// By default update the preference's state
				boolean result = true;
				// If exist call the listener
				if (listener != null) {
					result = listener.onPreferenceChange(preference, newValue);
				}
				return result;
			}
		});
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * android.preference.Preference#setOnPreferenceChangeListener(android.preference
	 * .Preference.OnPreferenceChangeListener)
	 */
	@Override
	public void setOnPreferenceChangeListener(OnPreferenceChangeListener onPreferenceChangeListener) {
		listener = onPreferenceChangeListener;
	}

	/**
	 * Return the current value. This value is NOT the value stored in the
	 * SharedPreference but the current value in the view editor of this
	 * preference. Useful when you want to retrieve the new value before the
	 * preference is updated
	 * 
	 * @return
	 */
	public String getCurrentValue() {
		String result = currentValue;
		// If not set then return the current state
		if (result == null) {
			result = getValue();
		}
		return currentValue;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see android.preference.ListPreference#setValue(java.lang.String)
	 */
	@Override
	public void setValue(String value) {
		super.setValue(value);
	}

	/**
	 * Convenient method to create an instance of EditTextPreference
	 * 
	 * @param keyP
	 * @param titleP
	 * @param summaryP
	 * @return
	 */
	public static ListPreferenceWithValue create(Context contextP, String keyP, int titleP, int summaryP, String[] versions) {
		ListPreferenceWithValue pref = new ListPreferenceWithValue(contextP);
		pref.setKey(keyP);
		pref.setTitle(titleP);
		pref.setSummary(summaryP);
		pref.setDialogTitle(titleP);
		pref.setEntries(versions);
		pref.setEntryValues(versions);
		return pref;
	}

}
